I'd vote for early February -- less crowded. Even if you didn't get any other discount, the "seasons" work out in your favor and could save a lot of money going in February.
Let's assume the seasons stay roughly the same next year. For this year, February 1 - 13 was value season at both the WL/AKL and the moderates. During value season at the WL, a standard room was $225 a night, rack rate. From Feb 14 - March 29, peak season at both WL and moderates, that same standard WL room was $340 a night, rack rate. (More if you were there over President's Day or Easter.) At the moderates, a standard room was $149 a night, rack rate, during the value season in early February. The same room during peak season in March was $189 a night, rack rate.
So, if you do choose WL, for instance, you get $115 a night "discount" if you go in early February as compared to March. (Which is a lot more than
AAA or AP discounts I've seen.) And the difference between that WL room in February and the room at the moderate in March is only about $35 a night. If you can justify a moderate in March, it's probably not much of a stretch to WL in value season. If you have AAA, you can probably get a discount to make the price lower by 10% or so. Since you have the choice of dates, you can basically make your own discount and still use AAA/AP/or whatever else is available by going in February.
I hope that makes sense...Disney prices make me feel like I'm talking in circles.